Math, asked by arbaj965690, 7 months ago

3. Evaluate :
(1)
sin? 63° + sin? 27°
cos? 17° + cos² 73 °
(ii) sin 25° cos 65° + cos 25° sin 65°​

Answers

Answered by anilkumarbarnwal873
9

Answer:

1. 1

2. 1

Step-by-step explanation:

(sin*2 63° + sin*2 27°)/cos*2 17° +cos*2 73°

= [sin*2(90-27)+sin*2 27°]/ cos*2 (90-73) + cos*2 73°

= (cos*2 27° + sin*2 27°)/ sin*2 73° + cos*2 73°

= 1/1

= 1

2. sin 25° cos 65° + cos25° sin 65°

=sin 25° sin(90-25)° + cos 25° cos(90-25)°

= sin*2 25°+ cos*2 25°

=1

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