Math, asked by naina8883, 7 months ago

cos× cos 30+ cos× cos 45+ cos× cos 60 + cos× cos 90

Answers

Answered by bensallen1992

5

Answer:

Step-by-step explanation:

cos 90 is zero . so, totall answer will be 0

Answered by naina0529

2

refer to the attachment

#hope it helps....

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