5. Prove that:
sin ⭕cos ⭕(90° - ⭕) + sin (90° - ⭕) cos ⭕ = 1
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2
Step-by-step explanation:
sin 0 is zero
hence first part
sin ⭕cos ⭕(90° - ⭕) equals zero
second part
sin (90° - ⭕) cos ⭕
cos 0 is 1
sin 90 is 1
hence 1× 1 is 1
LIKE FOLLOW
IF USEFUL
Answered by
2
Answer:
sin⭕️ cos(90°-⭕️) + sin(90°-⭕️) cos⭕️ = 1
sin⭕️ sin⭕️ + sin(90°-⭕️) cos⭕️ = 1 [cos(90°-⭕️) = sin⭕️]
sin²⭕️ + cos⭕️ cos ⭕️ = 1 [ sin(90°-⭕️) = cos⭕️]
sin²⭕️+ cos²⭕️ = 1
1=1
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