Last seen: Jun 14, 2021
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Given, sin 67° + cos 75° sin 67° = sin (90° – 23°) cos 75° = cos (90° – 15°) So, sin 67° + cos 75° = sin (90° – 23°) + cos (90° – 15°) Now, ...
We know that, for a given triangle, sum of all the interior angles of a triangle is equal to 180° A + B + C = 180° ….(1) To find the value of (B+ ...
sec 4A = cosec (A – 20°) We know that sec 4A = cosec (90° – 4A) To find the value of A, substitute the above equation in the given problem cosec...
remainder=214 explanation: x - 3 x = 3 p(x) =2(3)4 + 3(3) + 4(3)2 - 3(3)-2 p(x) = 162 + 27 + 36 - 9 - 2 p(x) = 214
tan A = cot B We know that cot B = tan (90° – B) To prove A + B = 90°, substitute the above equation in the given problem tan A = tan (90° – B) ...
tan 2A = cot (A- 18°) We know that tan 2A = cot (90° – 2A) Substitute the above equation in the given problem ⇒ cot (90° – 2A) = cot (A -18°) ...
(i) tan 48° tan 23° tan 42° tan 67° We know that, tan 48° = tan (90° – 42°) = cot 42° tan 23° = tan (90° – 67°) = cot 67° = tan (90° – 42°) tan ...
(iii) cos 48° – sin 42° We know that, 48° is written as 90° – 42°, which is equal to the sin 42°. = cos (90° – 42°) – sin 42° Substitute the val...
(i) We know that, 18° is written as 90° – 18°, which is equal to the cos 72°. = sin (90° – 18°) /cos 72° Substitute the value, to simplify this...
(i) False. Let us take A = 30° and B = 60°, then Substitute the values in the sin (A + B), we get sin (A + B) = sin (30° + 60°) = sin 90° = 1 an...
tan (A + B) = √3 Since √3 = tan 60° Now substitute the degree value tan (A + B) = tan 60° (A + B) = 60° …....(i) The above equation is assum...
Correct option: (C) tan 60° Explanation: Substitute the of tan 30° in the given equation tan 30° = 1/√3 2tan30°/1-tan230° = 2(1/√3)/1-(1/√3)2...
Correct option:(A) 0° Explanation: To find the value of A, substitute the degree given in the options one by one sin 2A = 2 sin A is true when A...
Correct option: (D) 0 Explanation: Substitute the of tan 45° in the given equation tan 45° = 1 1-tan245°/1+tan245° = (1-12)/(1+12) = 0/2 = 0
Correct option: (A) sin 60° Explanation: Substitute the of tan 30° in the given equation tan 30° = 1/√3 2tan 30°/1+tan230° = 2(1/√3)/1+(1/√3)2...
The national movement supported the idea that all adults have a right to vote because of the following reasons: Every responsible citizen should p...
The Members of Parliament are from different backgrounds. Many members are from rural areas and from regional parties. Groups and peoples that were ...
The first hour of every sitting during a Parliament Session is called the Question Hour. During ‘Question hour’ Questions are posed by members to spec...
After the Lok Sabha elections, a list is prepared showing how many MPs belonging to each political party have won the elections. The Political party w...