Question

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Answer 1

Answer:

Step-by-step explanation:

All theta 1, theta 2, theta 3 should be equal to 90

Then only it is possible to get

Sin theta1 + sin theta2 + sin theta3 = 3

So, then cos theta1 + cos theta2 + cos theta3 = 0

Answer 2

All  [theta]∅ 1, [theta]∅ 2, [theta]∅ 3 should be equal to 90

Then only it is possible to get

Sin [theta]∅1 + sin [theta]∅2 + sin [theta]∅3 = 3

So, then cos [theta]∅1 + cos [theta]∅2 + cos [theta]∅ 3 = 0

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