Show that I can do this part . Hence , state the range for Need help with this part . Thanks .
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Hello thereddevils Originally Posted by thereddevils Show that I can do this part . Hence , state the range for Need help with this part . Thanks . Now use the fact that to find the range of values of this expression. (Can you see why?) Grandad
Originally Posted by Grandad Hello thereddevils Now use the fact that to find the range of values of this expression. (Can you see why?) Grandad Thanks Grandad , but i don see how you got that range ? Can you help me a little further
Hello thereddevils Originally Posted by thereddevils Thanks Grandad , but i don see how you got that range ? Can you help me a little further The cosine of any angle lies between and . So the maximum value of is and its minimum value is . But when we square it, is always positive, and now lies between and . OK? Grandad
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